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HTML 

              
                <div class="price-block--wrapper">
  <article class="price-block">
    <header class="price-block__header">
      <h1 class="price-block__title">Basic Plan</h1>
      <span class="price-block__cost">Free</span>
      <span class="price-block__trigger">▾</span>
    </header>

    <div class="price-block__info">
      <button class="price-block__btn">Sign Up</button>
      <p>Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam egestas semper. Aenean ultricies mi vitae est. Mauris placerat eleifend leo.</p>
    </div>
  </article>

  <article class="price-block">
    <header class="price-block__header">
      <h1 class="price-block__title">Standard Plan</h1>
      <span class="price-block__cost">$10 per month</span>
      <span class="price-block__trigger">▾</span>
    </header>

    <div class="price-block__info">
      <button class="price-block__btn">Sign Up</button>
      <p>They're pretty neat huh?</p>
    </div>
  </article>

  <article class="price-block">
    <header class="price-block__header">
      <h1 class="price-block__title">Premium Plan</h1>
      <span class="price-block__cost">$20 per month</span>
      <span class="price-block__trigger">▾</span>
    </header>

    <div class="price-block__info">
      <button class="price-block__btn">Sign Up</button>
      <p>Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam egestas semper. Aenean ultricies mi vitae est. Mauris placerat eleifend leo.</p>
      <p>Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam egestas semper. Aenean ultricies mi vitae est. Mauris placerat eleifend leo.</p>
    </div>
  </article>

  <article class="price-block">
    <header class="price-block__header">
      <h1 class="price-block__title">Advanced Plan</h1>
      <span class="price-block__cost">First Born Child</span>
      <span class="price-block__trigger">▾</span>
    </header>

    <div class="price-block__info">
      <button class="price-block__btn">Sign Up</button>
      <p>It's only your first born child! What are you waiting for! No biggie right? Signup now!</p>
    </div>
  </article>
</div>
!

CSS 

              
                @import "compass/css3";

// $Globals
*,:before,:after {box-sizing: border-box;}html{font: normal 100%/1.5 sans-serif;word-wrap: break-word;}html,body{height: 100%;}

// ============================================================
// $Price Block Variables
// ============================================================

$viewport-increment: 0.1px;
$price-block-large: 740px;
$collapsed-price-block: $price-block-large - $viewport-increment;
$price-block-bg: #0D3640;
$price-block-color: #EFEFEF;


// ============================================================
// $Container
// ============================================================

.price-block--wrapper {
  @media screen and (min-width: $price-block-large) {
    display: flex;
  }
}

// ============================================================
// $Price Block
// ============================================================

.price-block {
  padding: 0 1rem; // 0 (16px/16px)
  font-family: 'Open Sans', sans-serif;
  font-weight: 400;
  font-size: 1rem;
  color: $price-block-color;

  @media screen and (max-width: $collapsed-price-block) {
    position: relative;
  }

  &:nth-child(1) {
    background: $price-block-bg;
    @media screen and (min-width: $price-block-large) {
      flex: 1;
    }
  }

  &:nth-child(2) {
    background: scale-lightness($price-block-bg, 5%);
    @media screen and (min-width: $price-block-large) {
      flex: 1;
    }
  }

  &:nth-child(3) {
    background: scale-lightness($price-block-bg, 10%);
    @media screen and (min-width: $price-block-large) {
      flex: 1;
    }
  }

  &:nth-child(4) {
    background: scale-lightness($price-block-bg, 15%);
    @media screen and (min-width: $price-block-large) {
      flex: 1;
    }
  }
}


// ============================================================
// $Price Block Header
// ============================================================

.price-block__title {
  margin-top: 0;
  margin-bottom: 1.25rem; // 20px / 16px
  padding: 1.25rem 0 0; // (20px / 16px) 0 0
  font-size: 1.25em; // 20px / 16px
  font-weight: 700;
  line-height: 1;
}

.price-block__cost {
  font-weight: 300;
  font-style: italic;
}


// ============================================================
// $Price Block Button
// ============================================================

.price-block__btn {
  appearance: none;
  border: none;
  margin: 0.625rem 0 0.3125rem; // (10px / 16px) 0 0 (5px / 16px)
  width: 100%;
  background: scale-lightness($price-block-bg, -25%);
  color: #EFEFEF;
  
  &:hover {
    background: scale-lightness($price-block-bg, -15%);
  }
}


// ============================================================
// $Price Block Info
// ============================================================

.price-block__info {
  padding: 0 0 1.25rem; // 0 0 (20px / 16px)
  @media screen and (max-width: $collapsed-price-block) {
    height: 0;
    visibility: hidden;
  }

  &.opened {
    @media screen and (max-width: $collapsed-price-block) {
      height: auto;
      visibility: visible;
    }
  }
}


// ============================================================
// $Price Block Trigger
// ============================================================

.price-block__trigger {
  @media screen and (max-width: $collapsed-price-block) {
    position: absolute;
    top: 5px;
    right: 20px;
    font-size: 1.5625em; // 25px / 16px
    font-style: normal;

    &:hover {
      cursor: pointer;
    }
  }

  @media screen and (min-width: $price-block-large) {
    display: none;
  }
}
!

JS 

              
                function priceToggle(e) {
  e.preventDefault();
  $(this).parent().next().toggleClass('opened');
}

$('.price-block__trigger').on('click', priceToggle);
$('.price-block__trigger').on('touchstart', priceToggle);
!
999px

Console